Hi,
Is Sonos current limit to a 5.1 (or 5.1.2) system due to software/firmware or due to hardware? If it’s firmware, hopefully that means a future remote update will open up the ability to pair more channels with our Arc (like 9.1 or 9.1.2)! Can you tell me what is currently bottle necking the home theater expansion?
If a Sonos employee -- Please pass on this request! 
Thank you for the info!
